:root {
  --bg: #fbfbf9;
  --fg: #1c1f22;
  --muted: #5d646b;
  --accent: #1f8a80;
  --accent-ink: #166d65;
  --accent-soft: #e4f3f0;
  --line: #e1e4e5;
  --card: #ffffff;
  --code: #f0f2f2;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 6px 20px rgba(0,0,0,.04);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141719;
    --fg: #e6e9ea;
    --muted: #9aa3a9;
    --accent: #7dc4be;
    --accent-ink: #9ad6d0;
    --accent-soft: #1b2b2a;
    --line: #2a3034;
    --card: #1b1f22;
    --code: #1f2428;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
.strands > *, .stat-row > *, .finding > *, .two > *, .compare > * { min-width: 0; }
.stat .v { overflow-wrap: anywhere; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 17px;
  line-height: 1.6;
}
a { color: var(--accent-ink); text-decoration: none; border-bottom: 1px solid transparent; }
a:hover { border-bottom-color: currentColor; }
img { max-width: 100%; height: auto; }

/* ---------- nav ---------- */
.nav {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.nav-inner {
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: 1.05em; color: var(--fg); border: 0;
}
.brand img { width: 30px; height: 30px; }
.nav-links { display: flex; gap: 18px; flex-wrap: wrap; margin-left: auto; font-size: .95em; }
.nav-links a { color: var(--muted); }
.nav-links a.current, .nav-links a:hover { color: var(--accent-ink); border-bottom-color: transparent; }

/* ---------- layout ---------- */
.wrap { max-width: 760px; margin: 0 auto; padding: 32px 20px 64px; }
.wrap-wide { max-width: 980px; margin: 0 auto; padding: 32px 20px 64px; }

h1 { font-size: 2.1em; line-height: 1.15; letter-spacing: -0.015em; margin: 0 0 .35em; }
h2 { font-size: 1.45em; line-height: 1.25; letter-spacing: -0.01em; margin: 2em 0 .6em; }
h3 { font-size: 1.12em; margin: 1.6em 0 .5em; }
p { margin: 0 0 1.1em; }
.lede { font-size: 1.15em; color: var(--muted); margin-bottom: 1.6em; }
.small { font-size: .9em; color: var(--muted); }
hr { border: 0; border-top: 1px solid var(--line); margin: 2.4em 0; }
blockquote {
  margin: 1.2em 0; padding: .2em 0 .2em 1.1em;
  border-left: 3px solid var(--accent); color: var(--fg);
}
code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: .9em;
}
code { background: var(--code); padding: .1em .35em; border-radius: 4px; }
pre {
  background: var(--code); padding: 14px 16px; border-radius: 8px;
  overflow-x: auto; line-height: 1.5; margin: 1.2em 0;
}
pre code { background: none; padding: 0; }
ul, ol { padding-left: 1.4em; }
li { margin-bottom: .4em; }
figure { margin: 1.8em 0; }
figure img { display: block; margin: 0 auto; border-radius: 6px; }
figcaption, .caption { font-size: .9em; color: var(--muted); margin-top: .6em; text-align: center; }
/* pandoc puts an <em> paragraph after each image as the caption */
p > img { display: block; margin: 1.8em auto .6em; border-radius: 6px; }
p > img + em, img + p > em { display: block; font-size: .9em; color: var(--muted); text-align: center; }

/* ---------- tables ---------- */
.tbl { overflow-x: auto; margin: 1.4em 0; }
table { border-collapse: collapse; width: 100%; font-size: .93em; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--muted); font-size: .88em; letter-spacing: .02em; }
tr:last-child td { border-bottom: 0; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
.tbl-note { font-size: .88em; color: var(--muted); margin: -.6em 0 1.4em; }

/* ---------- callouts ---------- */
.callout {
  background: var(--accent-soft); border-left: 3px solid var(--accent);
  padding: 14px 18px; border-radius: 0 8px 8px 0; margin: 1.6em 0;
}
.callout p:last-child { margin-bottom: 0; }
.kicker {
  font-size: .8em; text-transform: uppercase; letter-spacing: .12em;
  color: var(--accent-ink); font-weight: 600; margin-bottom: .6em;
}

/* ---------- landing ---------- */
.hero { padding: 24px 0 8px; }
.hero h1 { font-size: 2.4em; }
.hero .lede { max-width: 640px; }

.strands { display: grid; gap: 20px; grid-template-columns: 1fr; margin: 2em 0; }
@media (min-width: 720px) { .strands { grid-template-columns: 1fr 1fr 1fr; } }
.strand {
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 22px 22px 18px; box-shadow: var(--shadow); display: flex; flex-direction: column;
}
.strand h3 { margin: .2em 0 .5em; font-size: 1.15em; line-height: 1.3; }
.strand h3 a { color: var(--fg); }
.strand p { font-size: .95em; margin-bottom: .8em; }
.strand .more { margin-top: auto; font-size: .92em; font-weight: 600; }

.stat-row { display: grid; gap: 14px; grid-template-columns: minmax(0,1fr) minmax(0,1fr); margin: 1.4em 0; }
@media (min-width: 720px) { .stat-row { grid-template-columns: repeat(4, minmax(0,1fr)); } }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.stat .v { font-size: 1.6em; font-weight: 700; letter-spacing: -0.02em; color: var(--accent-ink); font-variant-numeric: tabular-nums; line-height: 1.1; }
.stat .l { font-size: .82em; color: var(--muted); margin-top: 4px; line-height: 1.35; }

.finding { display: grid; gap: 22px; grid-template-columns: 1fr; margin: 1.6em 0 2.4em; align-items: start; }
@media (min-width: 720px) { .finding { grid-template-columns: minmax(0,1.1fr) minmax(0,1fr); } }
.finding img { border-radius: 8px; border: 1px solid var(--line); background: #fff; }

/* ---------- panel embed ---------- */
.panel-frame {
  width: 100%; height: 560px; border: 1px solid var(--line); border-radius: 10px;
  background: #1C1F22; display: block;
}
@media (max-width: 720px) { .panel-frame { height: 640px; } }

/* ---------- footer ---------- */
.foot {
  border-top: 1px solid var(--line); margin-top: 48px; padding: 22px 20px 40px;
  font-size: .9em; color: var(--muted);
}
.foot-inner { max-width: 980px; margin: 0 auto; display: flex; gap: 18px; flex-wrap: wrap; justify-content: space-between; }